Tubular metallic frame.



E. n.` CLARK.

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l {Application med Nov. 5, 1900.) (Ilo lodsl.)

" WITNESSES;

HD/MY INVENTOR ATTORNEY INVENTOR Mi/M 2L-2:1 HTTDRNEY Patented Aug. 27,`I90I.

2 Sheets-Sheet 2.

E. D. CLARK.

4TUBULAR METALLIC FRAME.

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5 WITNESSES; n

- l NITED TATES PATEN Fris.

ERVING D. CLARK, OF SYRACUSE, NEW YORK.

TU B-U LAR M ETALLIC FRAM E.

SPECIFICATION forming' part 0f Letters :Patent N0. 681,196, dated August27, 1901. Application filed November 5, 1900. Serial No. 35.459. (Nomodeld t ToalZ whom t may concern:

Be it known that I, ERVING I). CLARK, a citi cuse, in the county ofOnondaga, in the State of New York, have invented new and usefulImprovements in Tubular Metallic Frames,

of which the following, taken in connection with the accompanyingdrawings, is a full,

y y clear, and exact description. n j lo1 The object of this inventionis to more se- 1 curely and permanently unite in their requij siterelative positions the members of a med tallic tubular frame, moreespecially members of bicycle-frames or other vehicle-frames :and tothat end the invention consists in the novel means for uniting saidmembers, as hereinafter described, and set forth in the `claims.

In the accompanying drawings, Figures l `and 2 are vertical longitudinalsections of two frame members united by my invention and showing saidinvention embodied in the j so-called iiush joint and lap-joint of saidmembers. Fig. 3 is a fragmentary side `view of the connection of thecrank-hanger tube of a bicycle-frame. longitudinal section of said partof the frame,

Fig. Il is a vertical and Fig. 5 is a vertical transverse section online X X in Fig.v 3. y

Referring to Figs. l and 2, a and b designate two steel tubes or tubularframe members disposed with one to extend laterally y from the side ofthe other. 3y 3 `permanently unite said members, I employ a t.

` j the tube a. adjacent to the tube b, which dam To rigidly andtubular. dam c, `which I insert into the end of is of suiiicient smallerdiameter than the inand closed at its inner end by an outward The outerend of said wall c2, which closes the interior of the dam.

Into the cavity d I insert a core e, formed by casting therein a moltenmetal, which I spe- `ciallyl prepare for that purpose and whichgreadilyamalgamates with the cold steel of t which the tubes a. and b areformed. Thel i `5e metal of the core eectually fills the cavity d, andin order to further anchor the core in the tube a I provide the latterwith an orifice f through its side or with some other suitable key-seatextending laterally fromthe interior of the tube. The cavity d extendsbeyond said orifice and allows the molten metal of the core to run intoand completely fill the orifice or key-seat. The outer end of the coreis formed with a suitable brace, by which the member b is firmly tied tothe member a.

When said members are to be united by the so-called flush joint, asshown in Fig. l of the drawings, I provide the side of the tube badjacent to the tube c with an opening t' and insert into the member b atubular dam or bushing g, which is flanged at its ends, as shown at g',to closely it to the interior of the tube b. The main portion of the damgis of a smaller diameter than the interior of the tube to form a cavityhbetween them. This cavity is directly opposite and communicates withthe cavity CZ, formed between the dam c and tube a, as hereinbeforedescribed, and thus the molten metal of the core is allowed to flow intoand fill both cavities h and d. For introducing said molten metal intosaid cavities I provide the side of the tube b with 'an aperture j andplace the two members ct and b in a suitable mold @provided with thenecessary gate O', communicating with the aperture j. The mold embracesa sufficientwportion of the member a to cover the orifice f and preventthe molten metal from escaping from said orifice. The molten metal ispoured into the gate O', from whence it flows through the aperture jinto the cavity h and thence into the cavity d, and by completelyfilling the two cavities it forms the core e, which rigidly andpermanently unites the two members o. andi?.

The mold is obviously to be removed from the tubes a and h after theaforesaid casting of the core e is completed. y

In uniting the members d and b by a lap-v joint, as represented in Fig.2 of the drawings, I use only the darn c in the tube a and dispense withthe dam g and aperturesj and i in the tube b and employ a mold D, formedwith the cavity D' around the exterior of the member b. rlhe end of themember ct is sufficiently remote from the side of the member ,b to allowthe molten metal to iiow from the roo.

cavity D to the cavity d, in which latter the said metal is allowed toenter the orificesf and f', and thus forni on the core integral lugsfilling said orifices and forming a secure lock between the core andtube. Themetal which fills the cavity C forms a band e around the tubeb.

In practicing my invention in fastening the usual tubular members B B B2to the crankhanger tube of a bicycle-frame I employ a tube l, which isformed with circumferential outward flanges Z on its ends. I place thistube, with the tubes B B B2 in their requisite relative positions, intoa suitable mold O, as indicated by dotted lines in Fig. 4 of thedrawings, which mold is formed with a cavity n around the tube Z and,ifdesired, also with a cavity'o around the end of the tube B. The tubes B'and B2 are provided with orifices p in their sides, and into the ends ofsaid tubes I insert dams r, similar to the dam c hereinbefore described,which dams extend ,beyond the orifices p, as shown in Fig. 4t of thedrawings. The orifices p,f, and f are each located remote from the endof the tube to form a positive and secure lock with the metal enteringthe same. The ends of the tubes B" and B2 are sufficiently remote fromthe tube Z to allow the molten metal to flow from the cavity n into thecavities surrounding the dams r. The mold O is provided with a suitablegate through Whichto introduce the molten metal, which in fiowing intoand completely iilling the aforesaid cavities forms the tie t, whichpermanently unites the tubes B B' B2 with the tube Z. The uniting metalbeing deposited on the exterior of the tube Z forms the hanger-tubeproper.

I claim- 1. In a tubular metallic frame the combination ofa tubedisposed to extend laterally from the side of another tube and providedwith a key-seat extending laterally from the interior of the tube andremote from the end thereof, and a core inserted in said tube and formedin one piece with a key anchored in the keyseat and with a brace tyingthe two tubes rigidly together.

2. In a tubular metallic frame, the combination of a tube disposed toextend laterally verse wall closing the interior of the dam, and

the inner end of said dam formed flaring to close the inner end of theaforesaid cavity, and a metallic core inserted into the said cavity andformed in one piece with a lug lling the orifice in the side of the tubeand with a brace tying the tubes rigidly together.

3. In a tubular metallic frame, the combination of a tube disposed toextend laterally from the side of another tubeV and provided in its sidewith an oriiice located remote from the end of the tube to form apositive lock, and a core in Said lateral tube formed in one piece witha lug iilling said orifice and with a sleeve on its outer end embracingthe companion tubes as set forth.

4. In a tubular metallic frame, the combination of a tube disposed toextend laterally from the side of another tube, a tubular dam insertedin said lateral tube and of smaller diameter to form around said dam acavity extending lengthwise thereof, the inner end of said dam formedHaring to close the cavity thereat and the outerend of the dam formedwith a transverse wall closing the interior of 'the dam, and a coreinserted into the aforesaid cavity and formed at its outer end with atransverse extension tying the tubes rigidly together. y

5. In a tubular metallic frame, the combination of a tube disposed toextend radially from the side of another tube and provided with anorifice in its side, and two cores formed in one piece and inserted intothe respective tubes and one of said cores formed with an integral lugfilling the aforesaid orifice as set forth.

ERVING D. CLARK.

Witnesses:

J. J. LAAss, I-I. B. SMITH.

